package com.example.crm.config.shiro;

import at.pollux.thymeleaf.shiro.dialect.ShiroDialect;
import com.example.crm.entity.Right;
import com.example.crm.service.IRoleService;
import org.apache.shiro.authc.credential.HashedCredentialsMatcher;
import org.apache.shiro.mgt.SecurityManager;
import org.apache.shiro.spring.security.interceptor.AuthorizationAttributeSourceAdvisor;
import org.apache.shiro.spring.web.ShiroFilterFactoryBean;
import org.apache.shiro.web.mgt.DefaultWebSecurityManager;
import org.apache.shiro.web.session.mgt.DefaultWebSessionManager;
import org.crazycake.shiro.RedisCacheManager;
import org.crazycake.shiro.RedisManager;
import org.crazycake.shiro.RedisSessionDAO;
import org.springframework.aop.framework.autoproxy.DefaultAdvisorAutoProxyCreator;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

import javax.annotation.Resource;
import java.util.LinkedHashMap;
import java.util.List;
import java.util.Map;

/**
 * @author lenovo
 */
@Configuration
public class ShiroConfig {
    /**
     * 注入Redis参数，从application.properties获得
     */
    @Value("${spring.redis.host}")
    private String host;
    @Value("${spring.redis.port}")
    private int port;
    //@Value("${spring.redis.password}")
    //private String password;
    @Value("${spring.redis.timeout}")
    private int timeout;
    @Resource
    private IRoleService roleService;

    /**
     * thymeleaf页面上使用shiro标签
     *
     * @return
     */
    @Bean(name = "shiroDialect")
    public ShiroDialect shiroDialect() {
        return new ShiroDialect();
    }

    @Bean
    /**
     * 开启shiro注解
     */
    public DefaultAdvisorAutoProxyCreator advisorAutoProxyCreator() {
        DefaultAdvisorAutoProxyCreator advisorAutoProxyCreator = new DefaultAdvisorAutoProxyCreator();
        advisorAutoProxyCreator.setProxyTargetClass(true);
        return advisorAutoProxyCreator;
    }

    @Bean
    /**
     * 开启aop注解支持
     */
    public AuthorizationAttributeSourceAdvisor authorizationAttributeSourceAdvisor(SecurityManager securityManager) {
        AuthorizationAttributeSourceAdvisor authorizationAttributeSourceAdvisor = new AuthorizationAttributeSourceAdvisor();
        authorizationAttributeSourceAdvisor.setSecurityManager(securityManager);
        return authorizationAttributeSourceAdvisor;
    }

    public RedisManager redisManager() {
        RedisManager redisManager = new RedisManager();
        redisManager.setHost(host);
        redisManager.setPort(port);
        //redisManager.setPassword(password);
        redisManager.setTimeout(timeout);
        return redisManager;
    }

    public RedisCacheManager cacheManager() {
        RedisCacheManager cacheManager = new RedisCacheManager();
        cacheManager.setRedisManager(redisManager());
        //缓存名称
        cacheManager.setPrincipalIdFieldName("usrName");
        //缓存有效时间
        cacheManager.setExpire(1800);
        return cacheManager;
    }

    /**
     * 会话操作
     */
    public RedisSessionDAO redisSessionDAO() {
        RedisSessionDAO sessionDAO = new RedisSessionDAO();
        sessionDAO.setRedisManager(redisManager());
        return sessionDAO;
    }

    /**
     * 会话管理
     */
    public DefaultWebSessionManager sessionManager() {
        DefaultWebSessionManager sessionManager = new DefaultWebSessionManager();
        sessionManager.setSessionDAO(redisSessionDAO());
        return sessionManager;
    }

    /**
     * 自定义Realm
     */
    @Bean
    public MyShiroRealm myShiroRealm() {
        MyShiroRealm shiroRealm = new MyShiroRealm();
        //设置启用缓存，并设置缓存名称
        shiroRealm.setCachingEnabled(true);
        shiroRealm.setAuthorizationCachingEnabled(true);
        shiroRealm.setAuthorizationCacheName("authorizationCache");
        //设置凭证(密码)匹配器
        shiroRealm.setCredentialsMatcher(hashedCredentialsMatcher());
        return shiroRealm;
    }

    /**
     * 安全管理器SecurityManager
     */
    @Bean
    public SecurityManager securityManager() {
        DefaultWebSecurityManager securityManager = new DefaultWebSecurityManager();
        //注入Realm
        securityManager.setRealm(myShiroRealm());
        //注入缓存管理器
        securityManager.setCacheManager(cacheManager());
        //注入会话管理器
        securityManager.setSessionManager(sessionManager());
        return securityManager;
    }

    /**
     * Shiro过滤器：权限验证
     */
    @Bean
    public ShiroFilterFactoryBean shiroFilterFactory(SecurityManager securityManager) {
        //shiro过滤器：权限验证
        ShiroFilterFactoryBean shiroFilterFactory = new ShiroFilterFactoryBean();
        //注入securityManager
        shiroFilterFactory.setSecurityManager(securityManager);
        //权限验证：使用Filter控制资源（URL）的访问
        shiroFilterFactory.setLoginUrl("/index");
        shiroFilterFactory.setSuccessUrl("/main");
        //没有权限跳转403页面
        shiroFilterFactory.setUnauthorizedUrl("/403");
        //必须使用LinkedHashMap(有序集合)
        Map<String, String> filterChainDefinitionMap = new LinkedHashMap<String, String>();
        //配置可以访问的资源(URL):静态资源
        filterChainDefinitionMap.put("/css/**", "anon");
        filterChainDefinitionMap.put("/fonts/**", "anon");
        filterChainDefinitionMap.put("/images/**", "anon");
        filterChainDefinitionMap.put("/js/**", "anon");
        filterChainDefinitionMap.put("/localcss/**", "anon");
        filterChainDefinitionMap.put("/localjs/**", "anon");
        filterChainDefinitionMap.put("/", "anon");
        filterChainDefinitionMap.put("/login", "anon");
        ////注销过滤器，自动注销
        filterChainDefinitionMap.put("/logout", "anon");
        //配置需要特定权限才能访问的资源(URL)
        //静态授权：包括全部需要特定
        /*filterChainDefinitionMap.put("/user/list", "perms[用户列表]");
        filterChainDefinitionMap.put("/user/add", "perms[用户添加]");
        filterChainDefinitionMap.put("/user/edit", "perms[用户编辑]");
        filterChainDefinitionMap.put("/user/del", "perms[用户删除]");*/
        //动态授权
        List<Right> rights = roleService.findAllRights();
        for (Right right : rights) {
            if (right.getRightUrl() != null && !right.getRightUrl().trim().equals("")) {
                filterChainDefinitionMap.put(right.getRightUrl(), "perms[" + right.getRightCode() + "]");
            }
        }
        //配置认证访问：其他资源(URL)必须认证通过才能访问
        //必须放在过滤器链的最后面
        filterChainDefinitionMap.put("/**", "authc");
        shiroFilterFactory.setFilterChainDefinitionMap(filterChainDefinitionMap);
        return shiroFilterFactory;
    }

    @Bean
    public HashedCredentialsMatcher hashedCredentialsMatcher(){
        HashedCredentialsMatcher hashedCredentialsMatcher = new HashedCredentialsMatcher();
        //使用md5算法进行加密
        hashedCredentialsMatcher.setHashAlgorithmName("md5");
        //设置散列次数：意为加密几次
        hashedCredentialsMatcher.setHashIterations(2);
        return hashedCredentialsMatcher;
    }
}